Windings too wide for bobbin?

Status
Not open for further replies.
C

cupoftea

Advanced Member level 6
Joined
Jun 13, 2021
Messages
3,059
Helped
62
Reputation
124
Reaction score
139
Trophy points
63
Activity points
15,963
Hi,
Cust sent us 500W full bridge to build and test.
They spec a txformer of
15:6:15 ie np/ns = 30/6
they want pri of 0.315mm diam and 3 strands.

But 0.315mm enam copper wire is 0.367mm diam in max tolerance.
So 15 turns would be 15 * 3 * 0.367mm = 16.5mm wide
But RM12 bobbin is only 14.6mm wide.
So do you agree...they cant do this?
 

Sort by date Sort by votes
what happens if you twist the three strands together, then wind the twisted group,
instead of winding them side by side?

assuming an equilateral triangle of three 0.315 (0.367) mm diameter wires,
the side of the triangle is 0.367 * 2, not 0.367 *3, so that will likely fit across the bobbin.
it will add height to the layer, (0.367 * 2 * root(3)/2 or 0.367 * root (3) ) so it may not fit on the bobbin vertically
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…